Heavy mass for manufacturing products with a high radioprotection capacity

Abstract

The mass, as that of any conventional concrete, is based on cement, aggregates, water and chemical additives that modify the properties of the concrete. According to the invention, the mass uses magnetite as an aggregate, with a highly continuous grain size in order to obtain an optimum homogeneity of the mass as well as a high density which provide an optimum barrier effect against radiation, allowing to reduce substantially the thickness of the wall required without affecting the barrier effect. The mass is ideally suited for obtaining poured concrete, concrete for bricks, concrete for slabs and dry mortar used to build radioactive premises such as radiotherapy and brachytherapy bunkers, radiology walls, etc.

1 . Heavy mass for manufacturing products with a high radioprotection capacity, such as enclosures for radioactive premises and the like, in the form of poured concrete, concrete bricks, concrete slabs or dry mortar, of the type incorporating cement, aggregates, water and chemical additives depending on the intended characteristics of the mass, such as strength, setting time, anti-freeze protection and others, characterised in that magnetite is used in it as an aggregate to increase the general density of the mass, with a highly continuous grain size of said magnetite in order to obtain an optimum homogeneity of the mass. 
   
   
       2 . Heavy mass for manufacturing products with a high radioprotection capacity, according to  claim 1 , characterised in that, to obtain both poured concrete and concrete for making bricks, magnetite with a grain size under 8 millimetres combined with magnetite with a grain size from 0 to 30 millimetres are used. 
   
   
       3 . Heavy mass for manufacturing products with a high radioprotection capacity, according to  claim 1 , characterised in that for application to obtain concrete for making slabs, the mass includes magnetite with a grain size under 8 millimetres as well as metal shavings. 
   
   
       4 . Heavy mass for manufacturing products with a high radioprotection capacity, according to  claim 1 , characterised in that to obtain dry mortar the mass incorporates magnetite with a grain size under 2 millimetres.